Comparison between Local Pig Breeds and Foreign Pigs in China 1. Fertility: China's local pig breeds are sexually mature and have many ovulations. According to the statistics of 9 varieties of northeast minced pigs, Jinhua pigs, Jiaxing black pigs and Neijiang pigs, the average sexual maturation time was 130 days, and the average number of ovulation pigs was 17.21 pigs and 21.58 pigs. Sexual maturity of foreign pig breeds is generally more than 180 days, and the number of ovulation is also less. The number of litters produced in local pig breeds is large. The average number of pigs produced in the above varieties was 10.54, and the average yield was 13.64. The average annual production of Landrace White Pigs and Large White Pigs with high fertility abroad was 9.25, with an average of 11 heads. In comparison, local pig breeds also have good breeding characteristics such as a large number of teats, obvious estrus, high conception rate, strong nursery abilities, and a high rate of piglet rearing. 2. Meat quality: Although the local pig breeds have more fat and less lean meat, the meat quality is obviously better than that of foreign pig breeds. In some foreign lean-breeding breeds, the incidence of PSE meat (ie, pale flesh, soft texture, and oozing out of the cut surface) is high. Chinese local pig breeds are of excellent quality, tender and juicy muscles, and the muscle fibers are fine and dense. Larger, moderate distribution of muscle marble, muscle fibers filled with fat particles, can produce a special flavor when cooking. 3. Adaptability: In the long-term natural selection and artificial selection process, local pig breeds have good cold-resistance, heat-resistance, disease-resistance, low-nutrition-tolerance, and ability to adapt to crude fiber feed. 4. Growth rate: In terms of growth rate, foreign pig breeds were significantly higher than those of local pig breeds in China. During the growing-finishing period, the average daily gain of Chinese local pigs such as local pigs, Jinhua pigs, and Taihu pigs was 453 grams. The average daily weight gain of foreign pigs Landrace, Duroc, and Yorkshire pigs was 667 grams. Foreign pig breeds can reach more than 90 kilograms at 180 days, while Chinese local breeds reach 90 kilograms far beyond 180 days. 5. Feed utilization rate: The average feed-to-meat ratio of Chinese local breeder pigs, Jinhua pigs and Taihu pigs is 3.5:1, and the average feed-to-feed ratio of foreign pig breeds Landrace, Duroc and Yorkshire pigs is 3:1. . The high feed utilization rate of foreign pig breeds can save feed and reduce feed costs. 6. Lean meat rate: The carcass lean rate of foreign pig breeds is higher than that of local pig breeds in China. When the weight of foreign pig breeds is 90 kilograms, carcass lean meat rate is more than 55%. Carcass lean meat percentage is 90 kilograms in local fat type pigs in China. 45% or less. Binary hybrid pig The two-way hybrid pigs are mostly hybrids of two foreign pigs, and the next-generation sow is mainly used to produce three-way hybrid pigs. Binary hybrid boars are usually castrated for fattening. Under the same production conditions, the production of Changbai and Dabai with good production performance was carried out by hybrid production. The litter size was about 12% higher than pure white or white, and the litter weight of weaned pigs was about 15% higher than pure white or white. The growth rate of two-way hybrid pigs is similar to that of purebred pigs, and the lean meat percentage is the average of the parental generation. The maternal and lactating capacities of the binary cross sows are significantly better than those of purebred pigs. Compared with purebreds, the binary crossbred pigs have strong resistance and are more resistant to roughage. Three-way hybrid pig Ternary crossbred pigs are the next-generation swine produced by the terminal father-family two-way hybrid sows, such as Du Changda or Du Dachang long-merchandise pigs. The three-way crossbred pigs mainly combine the advantages of the binary crossbred pigs and the advantages of the terminal male parent to produce a commercial pig with a high growth rate and a high lean meat ratio to obtain maximum economic benefits. Under the same production conditions, high-quality binary cross sows and Duroc boars were produced in three-way hybrids, and their litter size was higher than that of pure white or landrace 15%. Weaned litters have a litter weight that is 20% higher than purebred white or landrace. Due to the larger body weight of piglets at weaning, the number of days from birth to fattening is less than that of purebred pigs. The growth rate and lean meat percentage of hybrid pigs are similar to those of purebreds and do not change significantly due to hybridization. HT Series Boosting Air Cylinder Wuxi ASK Pneumatic Machinery Co.,Ltd , https://www.askpneumtic.com